Power-transmission device



oct. 2, 1923. 1,469,579

E.R.BORDEN POWER TRANSMISSION DEVICE Filed Aug. 4,

1922 3 Sheets-Sheet 1 POWER rTRANSMISSION DEVICE Filed Aug. 4, 1922 3 Sheets-Shea?I 2 Oct. 2, 1923. 1,469,579 E. R. BORDEN POWER TRANSMISSION DEVICE Filed Aug. 4, 192?, 3 Sheets-Sheet 5 Patented @et 2, i923.

TTE

EDWARD BOY BGRDEN, 0E' CHICAGU, ILLINOIS, ASSIGNR T0 MUDGE & COMPANY, 0F CCAGO, ILLVNOIS', A CRPORATION 0F LLXE'OIS.

IPWEB-TMNSMISSON DEVECE.

Application med Augusta, 1922. Serial No. 579,569.

To all 'wh/om t may concern:

Be it known that I, EDWARD ROY BORDEN, a citizen of the United States, residing at Chicago, in the county o Cook and State of Illinois, have invented certain new and use-` ful Improvements in Power-Transmission Devices, of lwhich the following is a specilication, reference being had to the accompanying drawings, and to the reference characters marked thereon, which form a part of this specification.

This invention relates to improvements in power transmission devices, and more particularly to that class of such devices which employ a friction disc clutch or drive unit; such, for example, as are used on motor driven inspection cars for railways.

This class of devices depends for the transmission of power from the motorl to the driven shaft or rear axle of the car, upon the friction between the smooth, Hat rim of a wheel, usually fibre covered, and the smooth face of a cast iron disc, which latter is the driving member. In action, and particularly when the load is heavy, there is a hea thrust4 upon the driving shaft which indios for ineciency. @ne general djiculty consists in the wearing of flatfspots on the fibre covered wheel due to the high' pressure necessary whenstarting under a heavy load.

The principal objectA ci my invention, therefore, is to produce a construction of the class described, in which the end thrust referred to is entirely eliminated.

Another object is to' provide a transmission device, compact and in which the control will be simple: that is to sary, in which there will he two speeds orwar Y and two speeds reverse controlled by a single operating lever.

Another object is to provide a construction which will not have troublesome drive chains and no gear shitin', the gears being alwa s in mesh. These an other advantages will e manifest as l proceed with the specification of my invention, which consists in the device and combination of devices herein illustrated and described and more particularly set forth in the claims.

ln the accompanying drawings: Fig. 1 is a plan outine view of a power plant transmission device embodying my invention.

Fig. 2 is a perspective view, on a larger scale, of the control lever and associated parts.

Fig., 3 is a vertical sectional view, enlarged, taken longitudinally of the pinion and gear shafts of the device.

Figs. 4 and 5 are verticalsectional views, enlarged, of the reversing gears and housing, the sections being taken in the planes indicated by the dotted lines 4-4 and 5--5 respectively.

lIn said drawings, A is a motor which may be of the twin-cylinder V-type, its shaft a provided with the usual ily-wheel A being coupled at b to the endd of a power shaft D, which in edect is an extension of the motor shaft a. The ower is transmitted, through an intermediate driving shaft B and its connections, from the power shaft D to the shaft or rear axle C. Upon the drivin shaft B are a pair of loosely mounted or ee-running spur gears 1 and 2, which mesh with spur ginions '3 and 4 keyed to `the power shaft This shaft D is in the line with vand directl above the driving shaft B. Each shaft and D is rotatably mounted in the supports or frame members E, which carry suitable antifriction ball bearin, each designated as a unit e. The shaft carries one member 5 of a shaft coupling, the other couplinlg member 6 bein on an extension shaft which is suit- .ab y mounted in the bearing 7 of the reversing gear housing G.

ntermediate the high speed ar 2 and the lowspeed gear l, the shaft carries a pair of clutches of the twin-disc t Aindicated at H, H', the former being olted at 8 to the low speed gear 1 and the latter similarly secured at 9 to the hi h' speed gear 2. The clutch H has a set o ivoted arms or fingers 10, the free ends o which are adapted for engagement by the annular cam surface 11, of a clutch collar or sleeve 12 ke ed to the shaft B, so as to slide thereon. hen the collar 12 is shifted towards said fingers. 10, the latter bear against the disc 13 and torce this disc into frictional contact with the other disc member le, thereby locking the ar l to the shaft B to rotate therewith. he clutch H is similarly constructed and operates to loch the gear 2 to the shaft B.

When the spur ear i is thus clutchedto the driving shaft ,low speed is transmitted to the driven shaft C from the power shaft D, through pinion 3,- gear 1, sha-ft B and extension shaft lB; and when the spur gear 2 is clutched to the shaft B, high speed is,

transmitted to the driven shaft C from the 5 power shaft D, through pinion 4, spur gear 2, driving shaft B, and extension shaft F.

The reversing mechanism connected with the shaft F will now be described. The

housing G has suitable bearings c, c, for

l@ the driven shaft or rear axle C. n the rear axle and within. said housing are a pair of oppositely facing, spaced apart beveled gears 15 and 16, each loosel mounted on the axle C to 'reel rotate t ereon. 'Intermediate l said bevele gears 15, 16, and suitably keyed at 17 to the axle C, is a slidable clutch collar 18 ada ted to be moved longitudinally of the v axle toward the one or the other of the gears and 16, as desired.

2@ The outside faces of the collar 18 and the proximate faces of the gears 15 and 16 are provided with coinplemental clutch notches and lugs 19 ot a familiar type, so as to en` gage and lock together the collar 18 with the one or the other of said gears. The collar 18 is provided with a circumferential cen-- trall arranged groove 20,'which is engaged by t e arms of a fork or lever 21, whereby said collar 18 may be moved lengthwise of 3@ the axle C.

0n the inner end of the shaft F, within the housing, andintermediate the two gears 15, 16, is a beveled pinion 22 keyed to the shalt 1F and in mesh with the two .beveled gears 15 and 16. llt will be understood that when the ear 15 is locked to the rear axle or driven s att C by the collar 18, the power transmitted through the shaft l?, beveled inion 22,'and gear 15, -will cause the axle to rotate in one direction; and when the collar 18 is locked to the gear 16, the 1o tation of the shaft l?, in thev same direction as before, will, throu h the pinion 22 and gear 16, cause theax e C to rotate in the.

35' reverse direction.

The oke 21 is securm to .the shaft 23 having hearing su port in the upper part ci the housing (t. l\ otion is communicated to the shalt 23 from avrocker shaft R, by'a link arm 242 to which one end of the shaft 23 is secured.

The clutch collar 12 is rovided, between its cam surfaces 11, 11, with a circumferential dan 25, and is actuated to slide toward' the clutc lil or the clutch H' as occasion re quires, by means ot a lever la The lower end ont this lever 'is rovided with a yoke 26, the arms out which are spread apart a distance eater than the diameter ot the C5 ly mounte upon trunnions 29.

ybodi neeaeve The support 28 is provided with a air ol trunnions 30, at right angles to the caring trunnions 29, b which the support 28 may itself be ivota ly mounted in suitable bearings in t e frame of the device. 'lt will be understood that the yoke 26 will have a ivotal movement about the trunnions 29 w ile the oke and the support 28 will have a l, or pivotal movement with respect to the ame, by means of the trunnions 30. rllvhe upper end of the yoke 26 is bolted to the lever L. Y is a yoke pivotally secured at 31 to the upper end of the yoke 26, and carries between its yoke arms a short shaft or rod 32. -Mounted ipon the proximate end of thejrocker shaft is is a link 33 havin its upper end 34 suitably apertured to agord a sliding bearing for the rod 32. llt will be understood from this construction that when the lever L is moved in one direction, such movement will swing the yokel 26 about the trunnions 29, and at the same time slide the rod 32 through the apertured link 33, thus producing the necessary movement to actuate the clutch collar 12, but producing no movement of the rocker shaft R. Thus the movement of the lever L in this particular does not change the direction of rotation' of the driven rear' axle or shaft C, but only edects a'change of the speed of rotation. lt will also be understood that when the lever Lis moved at right angles to the movement just referred to, the yoke 26 will swing bodily about the trunnions 30, causing thel oke Y and its rod 32 to move bodily. This movement will be communicated through the link 33 to` the rocker shaft A and cause the latter to swing sufficiently, through the link 2t, shalt 25 and' yoke 21, to shift the clutch collar 18 toward the one or the other of the two beveled gears 15, 16, thereby reversing the direction ofrotation of the shaft C without changing the speed of rotation; the recess 27- o the yoke 26 enabling the oke to slide about the flange 25 of the clutc collar 12 without shitting said clutch collar.

lP is a plate of the familiar' ttl-type; that is to say, a platefprovided with a recess shaped like the letter H. The control lever L extends through the [Hl recom ot the plate B and is thereby ided in its movement by the walls of sai recess. lt will thus be seen that but one lever controls both the change of speed and the change ot direction of the driven shaftin this mee, the rear axle C; and that the .arrangement ie such as to provide a. high speed and a low speed for the forward" movement as well asy for the reverse or rear movement.

lt will be noted that in the transmission device above described, placin ot the two clutches'll-ll and lll on the sha B 'ves me a very quick and easy control by bein able to shift from one speed to the other without ieo change of direction; and since the gears 1 and 3, and 2 and 4, are always in mesh great economy and efficiency is attained.

It will also be noted that with a single lever the chan e of -speedand change of direction and t e operation of the clutch is effected, so as to greatly simplify the device and its operation. Also `that I have a free running engine, that al1 end thrust on the bearings is avoided and that the parts, particularl the clutches are so assembled as to be readi y accessible for cleaning and adjustment.

I claim as my invention:

1. In a power transmission device comprising a motor, a driving shaft actuated thereby, a driven shaft, a reversing unit for the driven shaft and high and low speed units intermediate the driving shaft and thc reversing unit, a lever for shifting the reversing unit and for shifting from one speed unit lto the other, and operative connections between the lever and the reversing unit and also between the lever and each of the speed units, said connections including a rocker shaft operatively connected at one end to the reversing unit `and at its other end to said lever.

2. In a power transmission, device vcomprisng a motor actuated driving shaft, a driven shaft, a reversing unit, a pair of speed units, clutches intermediate. said speed units for actuating either as desired and a clutch for actuating the reversing unit, a vplivoted operating lever connecte with eac of said clutches, a rocker shaft,

a link thereon, `a clutch shaft pivotally y driven shafts, speed gear units, a 4reversing gear unit and clutches, a single control lever pivotally mounted to swing in planes at' right angles to each other, a clutch engaging yoke on the lever, a rocker shaft operatively connected at one end to the reversing unit, a yoke link on the lever, a link arm xedly mounted on the rocker shaft and slidingly connected with the link yoke.

In testimony, that I claim the foregoing as my invention I affix my si ture, in the presence of two witnesses, this 31st day of July, 1922.

EDWARDl ROY BORDEN.

Witnesses:

B. L. MAcGREeoR, TAYLOR BROWN. 

